Toyota 3b Repair Manual page 121

FUEL
SYSTEM
_
I
1B
and
148
(b)
Using a
wooden stick, remove the carbon adhering to
the nozzle needle
tiP.
(c)
Using
a
brass brush,
remove
exterior of the nozzle
bodY.
the
carbon from the
(d)
lnspect
the
nozzle body
for burns or corrosion'
(e)
lnspect
the
nozzle needle tip for damage or corrosion.
lf
any of these conditions are present, replace
the
nozzle
assembly.
3.
SINKING TEST
(a)
Wash the nozzle in clean diesel fuel.
HINT:
Do not touch
the
nozzle mating surfaces
with
your
fingers.
(b)
Tilt
the
nozzle body approx'
60
degrees and pull
the
needle out about one
third of its
length.
(c)
When released, the needle should sink down into
the
body vent smoothly by its own weight.
(d)
Repeat
this test, rotating
the
needle slightly
each
time.
lf
the needle does
not sink
freely, replace
the
nozzle
assembly.